<!DOCTYPE html>
<html lang="zh">
    <head>
        <meta charset="utf-8">
        <title>HTML5-script,noscript标记</title>
        <script src="/js/myscript.js"></script>
        <script type="text/javascript">
            var myStr = "Hello world!";
//            alert(myStr);
        </script>        
    </head>
    <body>
        这是一个HTML5的网页。
        <noscript><p>您的网页不支持javascript脚本功能，请检查您的浏览器设置。</p></noscript>  
        <script type="text/javascript">
            alert(myStr);
        </script>
    </body>
</html>